Origin of thirtyLate Middle English thirti, metathetic for thritti ; from Old English thritig ; from thri, three + -tig, -ty
- the cardinal number between twenty-nine and thirty-one; 30; XXX
Origin of thirtyprob. orig. telegraphers' code for a concluding sentence this number used to signify the end of a dispatch, story, etc., as for a newspaper
- The cardinal number equal to 3 × 10.
- thirtiesa. A decade or the numbers from 30 to 39: They settled down in their thirties. The temperature fell into the thirties.b. often Thirties The decade from 30 to 39 in a century.
- An indication of the end of a news story, usually written 30.
- Sports The second point that is scored by one side in tennis.
Origin of thirtyMiddle English thritty, thirty, from Old English thrītig; see trei- in Indo-European roots.
- thirtieth (ordinal number)
From Middle English thirty, metathetic alternant of Middle English thritti, Ã¾rittiÈ, from Old English Ã¾ritiÄ¡ (â€œthirtyâ€), from Proto-Germanic *Ã¾rÄ«z tigiwiz (â€œthrityâ€, literally â€œthree tensâ€), equivalent to three +â€Ž -ty. Cognate with Scots therty, tretty (â€œthirtyâ€), West Frisian tritich (â€œthrityâ€), Dutch dertig (â€œthrityâ€), German dreiÃŸig (â€œthirtyâ€).